Process of making calcium acid phosphate.



E. W. REED.

PROCESS OF MAKING CALCIUM ACID PHOSPHATE.

wits Lumps HWM APPLICATION FILED JULY 19,1913- Patented July 28, 1914.

8 wuentoz EZZZ'Ott 144 Read citizen of the United States, residing To all whom it may conce n a ETII'LIO'JPI W. REED, OF SAVANNAH, GEORGIA: PROCESS OF MAKING CALCTUM ACID PHOSPHATE.

Specification of Letters Patent; Pate'nted July 28, 1914.

. Application filed July 19, 1913. serial no. 'waeoa.

- Be it known that I, Enniorr W. Reno, t:

' Savannah, in the county of Chatham and cal manner."

State of Georgia, have invented certain new and usefiul Improvements ;in,Pr0cesses oi' Making Calcium Acid Phosphate, of WhICh the following is a specification.

My invention relates to a novel process pi and a paratus' for producing calcium acid phosp ate. f An important object of my inventlon is to provide a novel process for makmg calciu'miacid phosphate, by bringing powdered or finely divided phosphate material, such as powdered bone or phos hate rock into contact with sulfuric acid, y the employ, ment of a current of air as the agitating .va

means, whereby the process is carried out in an expeditious, contmuous and economi- A further object of my inventiop' is to provide apparatus of theabove mentioned character, which is simple in construction, easy to operate and cheap to manufacture.

Other objects and advantages of this invention will be apparent during the course of the following description.

My invention consists generally in the provision of means for forcmg owdered phosphate material, such as, phosp ate rock or bone, through or into a receptacle by a current of air, and spraying sulfuric acid, into the powdered phos hate materral laden air, whereby the acld w1ll act upon the same. in a highly efiicient manner, to produce cal; ciuin acid phosphate, which is collected ina suitable receptacle. The acidis alsosup-v I 5 ,Mounted with n the deflector 15, below and adjacent the opening 14, is a horizontal plate lied under pressure, whereby the same may e properly sprayed into the powdered phosphate material. laden air. By this means the powdered phos hate=mater1al and ac1d are continuously agitated in the presence preach; other and thoroughlv mixed. Means arei also provided whereby the relat1vevolumesj of 251d and phosphatematerlal may be propiregulatedn y the accompanying drawings forming a part of this specification and in which like numerals are employed to designate likeparts throughout the same, Figure 1 is a side elevation of the complete apparatus, and,,Fig. 2 is a detailed section through the spray apparatus.

In the drawings, wherein for the sake of end of this hopper is of the pipe 11 is prov ded with illustration, is shown a preferred example of the apparatus preferably employed in the practice of my process, the numeral 3' desig- Hat BS a hopper or receptacle for holding-thepowdered phosphate material, such as phosphate rock or bone.

tatable fan 5, connected in series therewith, serving to draw the powdered phosphate rock or bone from the hopper. The shell of the fan 5 is suitablyperforated, to allow of the entrance of air into the same, forming a downwardly flowing current of air, which is laden with the powdered phosphate rock .or bone dust. The fan 5 may bedriven by a belt 6 or other suitable means. Above the plpe 4 is provided with a cut on fan 5 the lve 7 and a regulating well known or preferred portion of the acid phosphate den or-chaniber 9, as shown.

The numeral 10 designates an acid pres sure supply tank, for receiving the sulvalve 8 of any type. The lower I furic acid. Connected with the tank 10 is a pipe 11 provided" with an adjustable valve 12 for controlling the amount of acid. passing through the ipe '11, As more clearly shown in Fig. 2, t e free end of the pipe 11 is bent downwardly for forming a depending portion 13, which extends through the lower vertical At its lower end the dependin portion 13 p a suitably large discharge opening 14, surrounded by a conicaldefiector or hood 1 5, increasing in diameter. downwardly, is attached to the lower end of thedepending portion 13 by any suitable means.

or-valve 16 adapted for movementtoward and away the passage of the acid therethrough and also serving to deflector spray the same laterally the deflector 15 and associated elements are mounted withinthe den 9. Connected with the lower end of the pipe 4- is an outer pipe it leads into a calcium.

portion of the pipe 4, in. spaced concentric relation thereto, as shown.

as shown. This hood rom the opening 14, to control- Leading into the lower a pipe 4, having a rov and horizontally. The plate or valveifi is rod 17 may be raisedor is called to the factthat conical deflector or hood "20, increasing diameter downwardly and surrounding the inner hood 1i in spaced concentric "rela-' tion. The air laden with the owdered phos hate rock or boneisdischarge through theeflector 20 and when passing from the lower end thereof comes in contact with the spray of sulfuric acid passing from the lower end of the inner deflector 15. Itis obvious that as a result of this calcium acid phosphate will be formed and collected r within the den 9.

The numeral 21 designates an acid holding tank, having connection with a pipe 22,

which leads into the upper end of the tank 10 and is provided with a out 01f valve 23.

Leading into the outer end of the tank '10 is an air outlet pipe 24, provided with acut oil valve 25. Leading into one side of the tank 10 near the upper end thereof is an air. pressure supply pipe 26, provided with a w cut oflt' valve 27 and a pressure gage 28;

The numeral 29; designates a glass tube gagltie, lgdlcating the level of acid within the tan 1 In carrying t y process, the valves 1 2 and 27 bemg closed, valves 23 and 25 are opened, whereby the acid will be fed from the tank 21 into the tank 10,.the air escap-.

ing through the pipe 24. Valves23 and 25 are now closed. The fan 5 is now set in operation, whereby the same creates a current of air in the pipe 4, passing downwardly I through the same into the den 9. The valves 7 and 8 are suitably opened, to supply the desired amount of the owdered pho hate .rock or'bone, whereby t e air passing ownwardly in the pipe 4 becomes laden with the same. The valve 27 is opened to allew the passage of the compressed air into the tank. 10, there being preferably maintained a' pressure of from 60 to 100 pounds within the tank 10, which will be indicated by the a passing from the same into the deflector 20,

to become mtimately mixed with the -powgage 28. The sulfuric acid employed is preferably of 52 Baum; at 120 to*- 160 Fhr. Upon opening the valve l2athe acid under pressure will be supplied to the pl 11 and discharged in a small stream or: et-

through the opening. 14 the same. im' inging against the plate or valve 16, where y it is sprayed horizontally and laterally against the inner deflector 15, such sprayed acid dered phosphate rock or bone laden .air.

The acid of course acts upon the powdered phosphate rocker bone, forming calcium acid phosphate, which is collected within,

the den 9.

While I. have shown and desfcrgibed the preferred embodlment of my process and apparatus, yet it is to be understood that various changes ma be made therein without departing from t e spirit of the invention or the scope of the subjoined claims.

' Having describedmy invention, I claim 1. The herein describedprocess of producing calcium acid phosphate, which consists in thoroughlyagitating finely divided phosphate material by means of a current of air, and' simultaneously subjecting the same to the action of an acid. U

y 2. The herein described process of producing calcium acid'pho'sphate, which consists in thoroughly agitating powdered phosphate, material by means of a current ofair;i

and spraying an acid upon the powdere phosphate material while the same is being subjected to such agitation.

3. The herein described process of producingcal'cium acid phosphate, which consists in spraying an ac d into a movin body of 'air which is laden with finely divi ed phosphate material.

phate formed as a result of the same.

.15. The herein described process of producing calciumacid phosphate,'which consists in passing air laden with powdered phosphatelmaterial through a conduit, passing throughthe first named conduit and spraying the acid into the phosphate material laden airnear the outlet end, of the conduit through which the phosphate material laden "air passes, and collecting the calcium acid phosphate formed as a result of the same.

"In'testimony whereofI aflix my witnesses.

I signature p sence or two I i i V P IoTTw. REED.

-Witnesseszl V "Geo. S. Hamns,

sulfuric acid through a conduit extending 

